Chastity Game Ideas for Uncertain Keyholders

So this is all still new and while my better half is trying to be ok with the cage and the whole chastity thing, its still a bit freaky for her, and she’s not naturally dominant (although her character changes slightly too when the cage is on..). Anyway, time locked up is a conversation we’re having. She still thinks a long time is cruel on me. I’m trying to explain its beneficial for both mer and her… Anyway (again), a dice game was discussed where two dice would be rolled - multiply one by the other and thats how many days I’m ‘in’. At the end of that period, the two dice would be rolled and multiplied, and thats how many days I’m ‘out’, and so on… Its helped her make it more of a game for now. My question is are there alternatives to this, or games or ideas that help ease an uncertain keyholder? I know there are a few other listings on here, but any thoughts on he above appreciated. Thnks